Concentrating-table.



ww/M @M @W W M c. W. WRIGHT. CONGENTRATING TABLE. APPLICATION FILED AUG.11, 1910. 1,051,049, Patented l12111.21, 1913.

CHARLES WILLIAM WRIGHT,

F WASHINGTON, .DISTRICT F COLUMBTA.

CON CEN TRTIN G-TABLE.

Losanna.

Specification of Letters Patent.

Patented Jan. 2i, 1913.

To all 'whom t may concern.'

Be it known that I, CHARLES WILLIAM WRIGHT, a citizen of the United States, re. siding at Washington,

in the District of Columbia, have invented certain new and useful Improvements in Concentrating-Tables, of which the following is a specification.

My invention relates to tables usedfor concentrating ores and is more particularly designed to provide a table adapted not only to separate the gangue from the metalliferous minerals, but also to separate such minerals from each other.

It also relates to certain structural features oi?` such tables, whereby there is obtained simplicity and strength of construction, as Well as a ready'adaptabilityor adjustment to varying conditions and classes of materials to be treated.

In the accompanying drawings Figure l is an 'elevation partly in section; Fig. 2 is a plan view of the table; Fig. 3 is a plan view of a portion of the bottom of the table; 4ig. 4 is anend elevation; Fig. 5 is a detail view of riiiles on the table; Fig. 6 is a detail view of grooves in the table; Fig. 7 is a de* tail view of the bumping mechanism; Fig. 8 is a det-ail View of the means for adjusting the horizontal angular relation of the table; and Fig. 9 is a detail showing a modified form of support for the table.

The table is made up of a frame-work consisting o f longitudinally extending iron l which may be of Wood to sheet metal plates 3 by nuts. lrangement the frame-Work can pipes l havmg a length of about 3% meters, and placed horizontally about l mete' apart. Passing through the pipes areiron rods 2 of suitable diameter and secured at their ends By this arbe rigidly clamped together. Transverse beams 4, carried by the pipes and longitudinal strips 5, carried by the transverse beams, make up the frame-Work. Diagonally laid boards 6 form the bottom of the table.

The table is supported on the foundation 7 by a series of resilient supports 8, 8, 8, or'metal, and to which is secured in. any suitable manner the central pipe-support 1. As shown in Fig. 4 iron plates 9 are secured to supports 8, the pipes 1 being carried in suitable openings in the plates 9. Journaled in ears 101 is a shaft 11, to which are secured eccentrics or caglis 12, which engage the bottom of the ta e.

51 is a keeper surrounding the cam.

by the line 27.

An arm 13 secured to the shaft is operated by means `of a rod 14 having a screwthreaded engagement with a bracket 15 secured 'to the ame-Work of the table.

16 is a hand-wheel for rotating thescrewrod, to vary the horizontal inclination of the table.

At the-feed end of the table the sur-face is given a more gradual slopetoward the lower edge, as shown at 25 in Fig.` 4, the inner edge of this sloped portion being tapered, as shown at the` left end of Fig. l, the extent and limits of this sloped portion being indicated Theportion of the table be tween lines 27 and 27a is beveled oli' to form a gradual slope from the raised portion to the surface of the table.

The upper surface of thetable is covered` with linoleum on the surface of which parallel riiiies 22 are attached. The rilies are made with a sharp -bevel of for instance, toward the upper side of the table, and with a. flat bevel of 30, for instance, toward the lower side'of the table, as shown in Fig. 5. The top edge of the rifiles is planed oi and it is found that this form of rille causes the least amount of disturbance to the stratification of beds formed on the table during concentration.

The intervenin flat spaces atlord, in the treatment of finely vcrushed ores, an opportunity for the heavier ore particles or concentrates to separate out and sett-le' to the bottom of the groove between the riiiies. The sharp bevel .of the next riflie prevents further movement of the heavier'particles across the table, while the general flow of the pul carrying stream is not interrupted. T e heavier particles are, so to speak, buried under a bed of lighter ores in remaining separated frornfthe lighter material and are gradually i ciprocating action o the table to the dischargeend of the groove. -There is thus little opportunity for loss of the heavier material by its lbeing washed over the crest of the next succeedln riile. The flat top of the ritllesl prevents te disturbance ofthe upper layersof the pulp stream, and assists further stratification with an easy descent of lthis space, thus progressed by the rethe concentrates into the succeeding channel.

The ritlies are from 2 tol 10 millimeters high at the feed end of the table and are planed down to zero toward the concentrate end of the table. However not all of them nut 42, screwed on the pipe.

vsecond sleeve 43 and ,a spring 44 and ad-4 adjusting ring 46,

the'springs enabling 220 may be .heavier minerals VJfarther j the lower part of the concentrate end, thus the tapering Shape concentrate end, while the ritlles having their.

ends in the convex curve 24 carry the neXt forward 'toward preventing them from being washed ott with the tailing ory middling discharges'.l

2O is the usual feed-box and 21 a waterfeed pipe adjustably arranged, so that the water may be delivered at various points on the table as desired. i

' Theztable is given a to-and-fro movement by an eccentric 30 carried on a shaft 31 and A rod which may bev driven by a pulley 32. made of strong wood, so as to be slightly liexible, is connected to an upright 10, which carries at its upper end a sleeve 40, (see Fig. 1), surrounding the central 4supporting pipe 1. A strong spring 41 is' located between the sleeve 40 and a tension-adjusting the sleeve 40 and mounted on the pipe is a justing nut 45, also screwed onto the central pipe 1. Between the sleeves 40 and,43 is an by means of which the distance between lated. In the operation of this portion ot the device, as the support 10 moves forward, the spring 41 is compressed, owing to the inertia of the table. As the Spring gradually asserts itself the table is pushed forward, and as the table is moving forward faster than the sleeve 40, the sleeve 43-is brought against the sleeve 40-and a slight bumpis imparted through the spring 44 and nut 45 to the table, the adjustability of the force of this bump to be nicely regulated. The eccentric connection then pulls the table back for its next forward movement.

The riiiies are shaped in cross-section as shown in Fig. 5. Instead ofriitles grooves used, in which case they are made of the shape shown in Fig. 6. The upper portions of these, iigures of the riles,.while the lower portions of the same gures show the shapes in cross-section at the planes indicated in dotted lines.

In the generalfy operation of the table. the feed material is fed onto the feedl endl of the table, its tendency to flow rapidly across the table being checked by the less inclined outer portion 25, thus insuring the early` precipitation of the slimes into the grooves between the riies. By the repeated impulses given cleaning of the heavier To the rear ofthesleeve can be regu--- show in lplan vvices connected to said member,

to the table the metalliferous material is gradually fedorward, the'heavier portions,

such as galena, arriving at the comparatively large unritfled portion of the table outside of the curve 23, where they can be subjected to the film of wash water from the pipe 21, while the lighter metalliferous portions of the ore, such as blende, are fed along the riilles and out onto the table opposite the curve 24. The tailings and middlings are delivered in lthe manner common to this class of concentrating table.

'When coarser material is to be treated, the supports 8' may be inclined as in Fig. 9, so that the movement of the table will give a slight upward throw to the material, the action being thus more of a jigging nature than when the movement of the table is in a substantially horizontal plane.

' I claim: u

1. The combination with a concentrating table of a reciprocating device moved positively in each direction. an adjustable resilient device interposed between the reciprocat-ing device and the table, an adjustable .abutment carried by the table and longitudinally j movable relatively thereto, for bumping engagement with the reciprocating device.

- 2. The combination with a concentrating table of a reciprocating device moved positively in eachl' direction, a resilient device interposed between .the reciprocating. device and t-hetable, andan abutment carried by the table and longitudinally movable relative thereto for bumping engagement with the reciprocating device.

l3. The combination with` a concentrating table of a reciprocating device .moved positively in each direction, an adjustable resilient device interposed between the reciprocating device and the table, and an abutment carried by theitable and longitudinally movable relativethereto for bumping engagement with the reciprocating device.

4. The combination with a concentrating table of a reciprocating device moved positively each-direction, -an adjustable resilient device interposed between the reciprocating device and the table, an adjustable abutment carried by the' table and longitudinally movable relative thereto for bumping engagement with the reciprocating device, and a spring between said abutment' and a fixed portion of said table.

. 5. A concentrating table comprising a central longitudinal member,supporting deand means secured to and movable bodily with the table and supp rting device for adjusting the angular position of the table.

` 6. A concentrating table comprising a central longitudinal member, resilient supporting .devic"es on which said member is pivoted, a cam or cams carried onone or more i of said supporting devices and engaging directly with said table, and means carried by said table for rotating the cams.

,7. A differentially reciprocating concentrating table having on its surface spaced rillies with intermediate plane surfaces, said rifl'les having a sharp inclina-tion toward the feed side of the table and a less inclined bevel toward the other side of the table` the tops of said ritii'es being flat.

8. A differentially reciprocating concentrating table having on its surface longitudinally extending rillles of gradually increased lengt-h, the ends of one portion of the ritlles being arranged in a curve concave with reference to the higher side of the table and extending from the feed end of the table toward the delivery end, and the ends of the other portion being arranged near the discharge end in a convex curve.

9. A` differentially reciprocating concentrating table having a surface, the transverse inclination of the Surface at the feed end 0f the table being less than the transverse inclination at the concentrate end, longitudinally extending ritlles arranged on the 'surface of said table, the ends of the rillles at the upper portionof the table being arranged along a concave curve, and the ends of the rifiles at the lower portion of the table being arranged in a convex'curve.

l0. A ditferentiallv reciprocating concentrating table having a continuous surface, I

the transverse inclination of the surface at the feed-end portion of the table being less than the transverse inclination at the concentrate-end portion, the tvvo portions being connected by a beveled surface-portion eX- tending angularly across the table shown.

l1. A concentrating table comprising a central longitudinal member, resilient supporting devices connected to said member, a reciprocating device moved positively 1n each direction, an adjust-able resilient device interposed between one side ot' the. reciprocating device and an Vabutment fixed to said member, an adjustable abutment carriedvby said member and longitudinally movable relative thereto for bumping engagement with the other side of said reciprocating device.

12. A concentrating table comprising a frame having a central longitudinal member, a central longitudinal series of resilient supports on Which said member is pivoted, means connected to the frame and supports for adjusting the angular position of the frame and movable bodily with said frame, and means connected to said member for imparting a movement to said table.

13. A concentrating table comprising a frame, a central longitudinal member form part of said frame, a central longitudinal series of resilient supports on which said member is pivoted, a shaft mounted in bearings on said supports, cams on said shaft engaging the table, and means for rotating said cam-shaft.

In testimony whereof, I aliix my signature in presence of two. Witnesses.

CHARLES VILLIAM lV RIGHT. lVitnesses:

N. P. LEONARD, J. H. BmoKENs'rniN.

ing a rigid 

